Answer:
Explanation:
Sum:515 tones
Difference:475 tones
First train's weight:(Sum-Difference)÷2=(515-475)÷2=40÷2=20 tones
Second train's weight:(Sum+Difference)÷2=(515+475)÷2=990÷2=495 tones.
train A is 475 tons and train B is 40 tons
515 minus 475 is 40 since train a is heavier you make the weight of it 475 and train b lighter
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